Record Details

Effect of Climate Change on Spodopteralitura Fab. on peanut: A life table approach

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Effect of Climate Change on Spodopteralitura Fab. on peanut: A life table approach
Not Available
 
Creator Srinivasa Rao, M*., Manimanjari, D., Rama Rao, C.A., Swathi, P., and Maheswari, M.
 
Subject Development time Insect pest Thermal constant Constant temperatures Life table parameters Climate change
 
Description Not Available
Investigations were conducted to understand the direct effects of rising temperature and the hostmediated
effects of elevated CO2 (eCO2) on Spodoptera litura (Fabricius) (Noctuidae: Lepidoptera). This
study involved i. the construction of life tables of S. litura at six constant temperatures viz., 20, 25, 27, 30,
33 and 35 C ± 0.5 C reared on peanut (Arachis hypogaea L.) grown under eCO2 (550 ppm) concentration
in open top chambers ii. Estimation of threshold temperatures and thermal constants and iii. Prediction
of the pest scenarios during near and distant future climate change periods. Significantly lower leaf
nitrogen, higher carbon and a higher relative proportion of carbon to nitrogen (C:N) were observed in
peanut foliage grown under eCO2 over ambient CO2 (aCO2). The mean development time (days) of each
stage, egg, larva, pupa, pre-oviposition and total life span decreased from 20 to 35 C temperature on
eCO2 foliage. The thermal requirement of S. litura from egg to egg (within the range of 20 Ce35 C) was
538.5 DD on eCO2 as against 494.5 DD on aCO2 foliage. Finite (l) and intrinsic rates of increase (rm), net
reproductive rate (Ro), mean generation time (T) and doubling time (DT) of S. litura varied significantly
with temperature and CO2 and were found to have quadratic relationships with temperature. The present
results on life table parameters estimated by the bootstrap technique showed that the ‘rm’ values of
S. litura on eCO2 foliage were higher than those in the literature indicating a significant influence of eCO2.
The reduction of ‘T’ was noticed from a maximum of 50 days at 20 C to minimum of 22 days at 35 C and
‘l’ which is the indicator of reproductive value of new eggs was highest at 35 C and showed a negative
relationship with temperature. The data on these life table parameters were plotted against temperature
and two non-linear models developed for both CO2 conditions and used for predicting the pest scenarios.
Prediction of pest scenarios based on PRECIS A1B emission scenario data at eleven peanut growing locations
of the country during near future (NF) and distant future (DF) climate change periods showed an
increase of ‘rm’ and ‘l’ with varied ‘Ro’ and reduced ‘T’. The present results indicate that temperature and
CO2 are vital in influencing the growth and life table parameters of S. litura and that pest incidence is
likely to be higher in the future.
Not Available
 
Date 2021-08-25T04:49:37Z
2021-08-25T04:49:37Z
2014
 
Type Research Paper
 
Identifier 66(2014), 98-106.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/60469
 
Language English
 
Relation Not Available;
 
Publisher Crop Protection